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render.py
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render.py
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#
# Copyright (C) 2023, Inria
# GRAPHDECO research group, https://team.inria.fr/graphdeco
# All rights reserved.
#
# This software is free for non-commercial, research and evaluation use
# under the terms of the LICENSE.md file.
#
# For inquiries contact george.drettakis@inria.fr
#
import torch
from scene import Scene
import os
from tqdm import tqdm
from os import makedirs
from gaussian_renderer import render
import torchvision
from utils.general_utils import safe_state
from argparse import ArgumentParser
from arguments import ModelParams, PipelineParams, get_combined_args
from gaussian_renderer import GaussianModel
import numpy as np
import matplotlib.cm as cm
def weighted_percentile(x, w, ps, assume_sorted=False):
"""Compute the weighted percentile(s) of a single vector."""
x = x.reshape([-1])
w = w.reshape([-1])
if not assume_sorted:
sortidx = np.argsort(x)
x, w = x[sortidx], w[sortidx]
acc_w = np.cumsum(w)
return np.interp(np.array(ps) * (acc_w[-1] / 100), acc_w, x)
def visualize_cmap(value,
weight,
colormap,
lo=None,
hi=None,
percentile=99.,
curve_fn=lambda x: x,
modulus=None,
matte_background=True):
"""Visualize a 1D image and a 1D weighting according to some colormap.
Args:
value: A 1D image.
weight: A weight map, in [0, 1].
colormap: A colormap function.
lo: The lower bound to use when rendering, if None then use a percentile.
hi: The upper bound to use when rendering, if None then use a percentile.
percentile: What percentile of the value map to crop to when automatically
generating `lo` and `hi`. Depends on `weight` as well as `value'.
curve_fn: A curve function that gets applied to `value`, `lo`, and `hi`
before the rest of visualization. Good choices: x, 1/(x+eps), log(x+eps).
modulus: If not None, mod the normalized value by `modulus`. Use (0, 1]. If
`modulus` is not None, `lo`, `hi` and `percentile` will have no effect.
matte_background: If True, matte the image over a checkerboard.
Returns:
A colormap rendering.
"""
# Identify the values that bound the middle of `value' according to `weight`.
lo_auto, hi_auto = weighted_percentile(
value, weight, [50 - percentile / 2, 50 + percentile / 2])
# If `lo` or `hi` are None, use the automatically-computed bounds above.
eps = np.finfo(np.float32).eps
lo = lo or (lo_auto - eps)
hi = hi or (hi_auto + eps)
# Curve all values.
value, lo, hi = [curve_fn(x) for x in [value, lo, hi]]
# Wrap the values around if requested.
if modulus:
value = np.mod(value, modulus) / modulus
else:
# Otherwise, just scale to [0, 1].
value = np.nan_to_num(
np.clip((value - np.minimum(lo, hi)) / np.abs(hi - lo), 0, 1))
if colormap:
colorized = colormap(value)[:, :, :3]
else:
assert len(value.shape) == 3 and value.shape[-1] == 3
colorized = value
return colorized
depth_curve_fn = lambda x: -np.log(x + np.finfo(np.float32).eps)
def render_set(model_path, name, iteration, views, gaussians, pipeline, background, near=0):
render_path = os.path.join(model_path, name, "ours_{}".format(iteration), "renders")
gts_path = os.path.join(model_path, name, "ours_{}".format(iteration), "gt")
depth_path = os.path.join(model_path, name, "ours_{}".format(iteration), "depth")
makedirs(render_path, exist_ok=True)
makedirs(gts_path, exist_ok=True)
makedirs(depth_path, exist_ok=True)
if near > 0:
mask_near = None
for idx, view in enumerate(tqdm(views, desc="Rendering progress", ascii=True, dynamic_ncols=True)):
mask_temp = (gaussians.get_xyz - view.camera_center.repeat(gaussians.get_xyz.shape[0], 1)).norm(dim=1, keepdim=True) < near
mask_near = mask_near + mask_temp if mask_near is not None else mask_temp
gaussians.prune_points_inference(mask_near)
for idx, view in enumerate(tqdm(views, desc="Rendering progress", ascii=True, dynamic_ncols=True)):
render_pkg = render(view, gaussians, pipeline, background, inference=True)
rendering = render_pkg["render"]
gt = view.original_image[0:3, :, :]
depth = (render_pkg['depth'] - render_pkg['depth'].min()) / (render_pkg['depth'].max() - render_pkg['depth'].min()) + 1 * (1 - render_pkg["alpha"])
torchvision.utils.save_image(rendering, os.path.join(render_path, '{0:05d}'.format(idx) + ".png"))
torchvision.utils.save_image(gt, os.path.join(gts_path, '{0:05d}'.format(idx) + ".png"))
torchvision.utils.save_image(1 - depth, os.path.join(depth_path, '{0:05d}'.format(idx) + ".png"))
torchvision.utils.save_image(render_pkg["alpha"], os.path.join(depth_path, 'alpha_{0:05d}'.format(idx) + ".png"))
depth_est = depth.squeeze().cpu().numpy()
depth_est = visualize_cmap(depth_est, np.ones_like(depth_est), cm.get_cmap('turbo'), curve_fn=depth_curve_fn).copy()
depth_est = torch.as_tensor(depth_est).permute(2,0,1)
torchvision.utils.save_image(depth_est, os.path.join(depth_path, 'color_{0:05d}'.format(idx) + ".png"))
def render_sets(dataset : ModelParams, iteration : int, pipeline : PipelineParams, skip_train : bool, skip_test : bool, near : int):
with torch.no_grad():
gaussians = GaussianModel(dataset.sh_degree)
(model_params, _) = torch.load(os.path.join(dataset.model_path, "chkpnt_latest.pth"))
gaussians.restore(model_params)
gaussians.neural_renderer.keep_sigma=True
scene = Scene(dataset, gaussians, load_iteration=iteration, shuffle=False)
bg_color = [1,1,1] if dataset.white_background else [0, 0, 0]
background = torch.tensor(bg_color, dtype=torch.float32, device="cuda")
render_set(dataset.model_path, "eval", scene.loaded_iter, scene.getEvalCameras(), gaussians, pipeline, background, near)
if not skip_train:
render_set(dataset.model_path, "train", scene.loaded_iter, scene.getTrainCameras(), gaussians, pipeline, background)
if not skip_test:
render_set(dataset.model_path, "test", scene.loaded_iter, scene.getTestCameras(), gaussians, pipeline, background)
if __name__ == "__main__":
# Set up command line argument parser
parser = ArgumentParser(description="Testing script parameters")
model = ModelParams(parser, sentinel=True)
pipeline = PipelineParams(parser)
parser.add_argument("--iteration", default=-1, type=int)
parser.add_argument("--skip_train", action="store_true")
parser.add_argument("--skip_test", action="store_true")
parser.add_argument("--quiet", action="store_true")
parser.add_argument("--near", default=0, type=int)
args = get_combined_args(parser)
print("Rendering " + args.model_path)
# Initialize system state (RNG)
safe_state(args.quiet)
render_sets(model.extract(args), args.iteration, pipeline.extract(args), args.skip_train, args.skip_test, args.near)